Hi Andrew,
Please don't misunderstand me:I am not ruling out the possibility of Golden Oriole wintering so far north,especially given that the climate would be suitable.
What I AM saying is that,based on the description given,this bird sounds at odds with any age/sex of Golden Oriole.I am more than aware that imm.males are greenish at first,becoming yellow later,and am also aware that old females can be very yellow indeed,and difficult to seperate from adult males.
However,I have yet to see a photo of the species that suggests that the body plumage could be yellow while the crown was still greenish yellow.Also,the description refers to 'dark streaks(my italics)' on the wings:Golden Oriole has dark wings,but the wording used here would suggest paler wings with contrasting streaking.Finally,the bill and eye colour are not indicative of Golden Oriole.
While I'd be the first to hold my hands up if and when 'good' photographs become available,I feel that you have perhaps misinterpreted my comments?Rest assured that I'm no expert,and could easily be wrong,but I'm offering my honest opinion!
Agree that more information from Eric would be quite valuable here.
Harry H